Bunch builder for winding machines



Oct. 29, 1957 H. 1 MuscHAMP ET AL BUNCH BUILDER FOR WINDING MACHINESFiled June 15. 1954 7 Sheets-Sheet 1 Oct. 29, 1957 H. MUscHAMP ETAL2,811,318

BUNCH BUILDER FOR WINDING MACHINES v Filed June 15, 1954 '7 Sheets-Sheet2 Oct. 29, 1957 H. L. MUscHAMP ET A1. 2,811,318

BUNCH BUILDER FOR WINDING MACHINES Filed June 15, 1954 7 Sheets-Sheet 35MM d Oct. 29, 1957 H. 1 MUscHAMP ETAL 2,811,318

BUNCH BUILDER FOR WINDING MACHINES Filed June 15. 1954 '7 Sheets-Sheet 4Oct. 29, 1957 H. L. MuscHAMP ETAI- 2,811,318

BUNCH BUILDER FOR WINDING MACHINES Filed June 15, 1954 7' sheets-sheet 5Oct. 29, 1957 H. L. MUscHAMP ETAL 2,811,318

BUNCH BUILDER FOR WINDING MACHINES 7 Sheets-Sheet 6 Filed June 15, 1954M MMM/@W Oct. 29, 1957 H. l.. MUscHAMP ET AL 2,811,318

BUNCH BUILDER FOR WINDING MACHINES Filed June 15, 1954 7 Sheets-Sheet '7BUNCH UninER ron WINDING MACHINES Harold Lionel Muschamp, Bramhall, andJohn Robert Grady, Cheadle Hulme, England Application .lune 15, 1954,Serial No. 436,918

6 Claims. (Cl. 242-27.1)

This application is a continuation-in-part of the parent applicationSerial No. 199,411, tiled December 6, 1950, now Patent No. 2,701,108,issued February 1, 1955.

This invention relates to yarn guides for pirn winders and isparticularly, though not exculsively, applicable to automatic pirnwinders in which a so-called automaton is set going on the completion ofeach pirn and takes control of the sequence of operations includingprincipally to stop the winding, to doif the full pirn from the windingstation, to don an empty bobbin thereat, to restart the winding and tostop until it is again set goingV or triggered oil when the winding ofthe new pirn has reached completion.

As is well known, the yarn guide of a pirn Winder has an oscillatingmotion or traverse superimposed on a progressive advance, so that thepirn winding is built up of a plurality of superimposed conical layers.In addition to this there is usually superimposed on the progressiveadvance mechanism an initial control which increases the rate of advanceso as to give the base of the pim Winding a suitable conical shape.

It is also well known in the winding of a pirn to build a small bunch,or short group of turns of yarn, at the start of the wind, the guidebeing given a few traverses of short amplitude before the normal Windingtraverse is commenced. Where the advance and oscillation movements ofthe yarn guide are obtained from within the windinghead, e. g. by meansof a feed screw which is rotated by gearing to provide the advance aswell as oscillated by cam means to provide the traverse, both gearingand cam means being within the headstock, it is practical under vthecontrol of the automaton, to start with a short oscillation of the feedscrew as is required for bunch building and then to change to the normalwinding traverse.

However, in another known type of pirn winding the yarn guide ispivotally mounted on a carriage and oscillated by means, such as a cam,mounted on the carriage and driven by a rotating shaft from theheadstock the carriage being advanced by feed screw and nut or rack andworm with or without feeler control arranged to control the advance bycontact of a feeler with the pirn winding. One major advantage of sucharrangement is that the mass of the oscillating or reciprocating partscan be much less than where such motion is obtained from the headstock,but hitherto it has not been possible to impart bunch building movementto the yarn guide at the commencement of winding of each pirn.

One object of the present invention is to provide ih combination yarnguide traverse motion in which the yarn guide is oscillatably mounted ona carriage and the oscillating movement for the traverse of the wind isderived lfrom oscillating mechanism mounted on the carriage, and meansfor imparting to said yarn guide a bunch building motion.

Another object of the present invention is a yarn guide traversemechanism, applicable to a fully automatic pirn attent Winder and havinga simple and practical construction and arrangement of parts. v v

Other objects of the invention will be readily appreciable from thefollowing description of a practical embodiment of the invention.

According to the invention, yarn guide mechanism for a pirn Windercomprises a carriage, a yarn guide pivotally mounted on ythe carriage,reciprocation-imparting means mounted on the carriage for reciprocatingthe yarn guide to provide a normal traverse therefor and furtherreciprocation-imparting means operably associable with the yarn guideadapted to over-ride the normal traverse` reciprocation and to impar-t abunch bui1dingrecipro cation for the commencement of Winding of a iprn.

According to the invention as applied to a fully automatic pirn Winderhaving operation sequence control mechanism comprises in combination ayarn guide car riage having means for advancing the same progressively,a reciprocable yarn guide mounted on the carriage,reciprocation-imparting mechanism on the carriage operably associatedwith the yarn guide for imparting reciprocation thereto to provide anormal traverse for the wind and means for imparting bunch buildingytraverse to the yarn guide over-riding the normal traverse aforesaidvcom-k prising further reciprocation-imparting mechanism operablyassociable with the yarn guide and means operably associated with thesaid operation sequence control mechanism of the pirn Winder forengaging and disengaging said further reciprocation-imparting mechanismfor bunch building at the commencement of winding of each pirn.

In the mechanism aforesaid, the means for imparting bunch buildingreciprocation to the yarn guide may comprise a hook engageable with theyarn guide, mechanism for moving the hook in one dimension to bring thesame into or out of engagement with the yarn guide, further mechanismfor reciprocating the hook to impart a bunch building traverse to theyarn guide and means operably associating the operation sequence controlmechanism with the mechanism for engaging and disengaging the hook; orsaid means may comprise a hook-ended lever the hook of which is adaptedto be engaged with the yarn guide, a pivot rod mounted in a guide in themachine and fixed to the lever, cam means for reciprocating the saidpivot rod in such manner as to impart bunch building reciprocation tothe yarn guide and means operably associated with the sequence controlmechanism and connected to the other end of the lever for tilting thelever to bring the hook into or out of engagement with the yarn guide.

In the accompanying drawings:

Figure l is a side elevation;

Figure 2 is a front elevation, and

Figure 3 is a plan showing one example of a yarn guide advance feed andtraverse mechanism of a conventional type but With a bunch builderdevice in the form of a hook which in Figs. 1 and 2 is depicted engagedwith the wire guide;

Figures 4 and 5 are views similar to Figs. l and 2 showing thebunch-building hook in its normal or inoperative position disengagedfrom the yarn guide;

Figure 6 is a fragmentary rear elevation from within the headstockshowing the essential mechanism controlling the movements of the bunchbuilding hook;

Figure 7 is a side elevation of Fig. 9;

Figures 8 and 9 are complementary plans of the mechanism shown in Figs.6 and 7 with the bunch builder in its Working and non-Working positionsrespectively;

Figure l() is a modiiication.

As shown in Figs. 1 to 5, extending from the headstock casing 10 for thewinding spindle 10a are guide rods 11 and 12 on which is slidablymounted a carriage 13. De-

pending from the carriage below the rod 11 are a pair of lugs 14 throughwhich passes a cam shaft 1S driven from within the headstock casing inknown manner. The shaft 15fis of square section and carries a wing cam16 positioned between the arms 14 so as to be slidable on the shaft withthe carriage while constrained to rotate with the shaft. -Level with theguide 11 is a feed screw 17 arranged to be driven in known manner fromwithin the headstock casing while pivotally mounted on the carriage 13is an arm 18 having a half-nut head portion 19 adapted normally to beengaged with the feed screw under the action of a spring 20. At theother side of the carriage is a further depending lug 21 carrying abushing 22 in which is pivotally mounted a spindle 23. At one end of thespindle is iixed a wire guide 24 while to the other end is pinned adepending arm 25 carrying a slidably adjustable earn follower 26. Withina housing in the arm 25 is a return spring 27, one end of which isattached to the arm and the other to the bushing 22. Above the guide rod12 and projecting through a bushing 2S in the casing 10 is a rod 29 towhich is attached a hook 30 adapted to be engaged with the yarn guide 24as shown in Figs. 1 and 2, or by turning the rod 29 to be disengagedfrom the yarn guide as shown in Figs, 3 and 4. The hook 3b is arrangedto impart bunch building motion to the yarn guide and is known as thebunch building hook. It is given an oscillating motion by mechanismwithin the casing arranged to impart an oscillating motion to the rod 29and is positioned for engagement or disengagement by mechanism arrangedto turn the rod 29 about its own axis. AsV shown in Figs. 6 to 9 theshaft 29 extends within the casing 10 and on its inner end is a groovedcollar 31 having a radially depending peg 32 fixed in one flange, thecollar being adjustably secured to the shaft by a grub screw 33. Fixedby bolts 34 to the front wall of the casing 10 on its inner face is aplate-like bracket 35 to which is fixed a depending bearing bushing 36having an upper ange 37 located against the underside of the bracket.The upper end of another bushing 136 passes through the bracket andthrough a collar 38 into which it is riveted over. Journalled in suchbushing is a vertical rocker shaft 39 to the lower end of which isclamped a rocker arm 40 carrying a depending cam-follower stud 41engaged with a cam 42 which is shown in chain line in Figs. 6 and 7 andFigs. 1 and 4, such cam being secured to the inner end of the wing camdriving shaft 15. The cam 42 has three ridges and three valleyssynchronised with those of the wing cam 16 but of shallower form.

The arm 40 and cam 42 are omitted from Figs. 8 and 9 Y to avoidconfusion with the other parts shown therein.

Clamped to the upper end of the rocker shaft 39 is a bell crank lever 43one arm of which carries a ratchet pawl 44 having a long tail 44a andreturn spring 45, while the other arm carries a depending stud 46. Lyingon the upper face of the bracket and located over the collar 3S is anotched wheel 47 carrying an upstanding stop peg 48, the position ofwhich stud may be adjusted and determined by a holding catch 49.Rotatably journaled on the upper end of the rocker shaft 39 is a ratchetwheel 50 complementary to the pawl 44, having a depending stud 51adapted to engage the stud 48 as shown in Fig. 8. The ratchet wheel isurged by a spring 52 to rotate in a clockwise direction as seen in Fig.8, such rotation being limited by the engagement of the said stud 51with the stud 48. The ratchet wheel is formed with a facial notch 53 ofhalf the thickness of the wheel, complementary to a holding pawl 54secured to the upper end of a spindle 55 journaled in a bushing 56 xedin the bracket 35. The pawl 54 has a cam shaped extension 57complementary to the stud 46 while fixed to the lower end of the spindle55 is a slotted arm 58, the slot of which is engaged by the dependingpeg 32. A coil spring 59 is located on the bushing 56 and is arranged tourge the arms 54 and 58 in a` clockwise direction about the axis of thespindle 55.

The arm S8 has an extension 58a to which is pivoted one end of a slottedlink 60, in the slot of which is located a peg 61 of a resetting arm 62which is clamped to a shaftl 63, such shaft and arm forming a resettinglever for the bunch builder mechanism above described and being in factpart of the automaton which is not described or illustrated. Such leveralso carries a trip stud 64 complementary to the cam tail 44a. Pivotedat 65 to the bracket 35 is a lever 66 which carries at its end a block67 engaged with the groove of the collar 31 and in such lever arealternative holes 68 for the pivoted connection of one end of a link 69,the other end of which is connected to the bell crank lever 43.

ln operation, during the winding operation proper, the carriage 1.3 isslowly advanced by the feed screw 17 away from the headstock casing 1t),due to the engagement of the half-nut head 19 of the arm 18 with suchfeedscrew. A-t the. same time, the yarn guide 24 is continuouslyreciprocated bythe wing cam 16 through contact of the cam follower 26with one of the annular cam-face steps. In this connection it is to benoted that at the ridges of the earn, all the ridges as seen on the lefthand side of the cam in Figs. 1 or 4 are at the same level but vare ofprogressively varying depth at the valleys and consequently the follower26 may be set to engage one or other of the faces of the stepped cam togive different lengths of traverse to the yarn guide each positiongiving the same base and location for the guide. The wing cam 16 movesalong the camshaft 15 with the carriage to maintain the traverse motionwhile the camshaft and feed screwvare driven in known manner throughsuitable gearing within the headstock casing, such gearing not beingdescribed or illustrated as it forms no part of the invention and wouldonly confuse the drawings. The drive for the winding spindle 10a is alsonot included for the same reason.

When the winding of the pirn has been completed, as may be determined inany known manner, the automaton, also in known manner, disengages thehalf nut from the feed screw for quick return of the carriage 13 to itsstarting position, declutches the drive to the winding spindle, camshaftand feed screw and moves the reset lever 62 clockwise as seen in Fig. 8to reset the bunch builder, such lever being moved until the stud 61, byengaging the end of the slot in the link 60 lifts the holding pawl 54out of the notch 53 and clear of the teeth of the ratchet wheel 50. Thismovement also swings the arm58 anti-clockwise in Fig. 8 so that thedepending peg 32 by engagement with the slot in such arm turns the shaft29 causing the hook 30 to be lowered to its working position as shown inFigs. l and 2. At the same time, the trip stud 64 on the arm 62 engagesthe tail 44a of the pawl 44 to disengage the same from the teeth of theratchet wheel and the ratchet wheel is then returned by its spring 52until its depending stud 57 engages the upstanding stud 48 on thenotched wheel 47. The automaton then proceeds through its normal cycleto remove the full pirn from the winding spindle 10a and replace it witha new empty pirn, trapping the yarn ready for starting the winding'andsevering the yarn below the new pirn finally to release the full one.The reset lever 62 is ultimately returned by the automaton to the normalposition shown in Figs. 8 and 9 and when the automaton restarts thewinding, the yarn guide 24 is held back by the hook 30 so that itreceives the short reciprocating movement of such hook obtained from thecam 42 through the stud 41, vertical shaft 39, bell crank 43, link 69,lever 66 and collar 31, and not from the Wing cam 16. The shaft 39 alsooscillates the bell crank leverV 43 which through the pawl 44 proceedsto turn the ratchet wheel in a counter-clockwise direction, tooth bytooth, the holding pawl 54 as seen in -Fig. S engaging the ratchet teethand preventing return movement of the ratchet wheel 50 under the actionof its spring 52. When the notch 53 is finally brought into registerwith the holding pawl 54 such pawl drops into the notch to the positionshown in Fig. 9, permitting the arm S8 also to move to the positionshown in Fig. 9, turning the shaft 29 to lift the hook 30 into thedisengaged position shown in Figs. 4 and 5. Simultaneously,reciprocation of the hook 30 is stopped by the cam 57 engaging below thestud 46 which holds the bell crank lever 43 in a position such that thecam follower stud 41 is just clear of the ridges of the cam 42.

As shown in Fig. l0, instead of having a hook 30 to pull back the yarnguide, a shaft 70 is provided, instead of the shaft 29 and having a bentend 71 adapted directly to engage the end of the arm 25. The shaft 70 isadapted to be reciprocated and turned by the same mechanism as describedfor the shaft 29 to position it in or out of the path of the arm 25 sothat it can impose a bunch building reciprocation on the yarn guide inlieu of the normal traverse reciprocation from the cam 16.

We claim:

1. Yarn guide mechanism for a pirn Winder comprising a carriage, a yarnguide pivotally mounted on the carriage, reciprocation-imparting meansmounted on the carriage for reciprocating the yarn guide to provide anormal traverse therefor and further reciprocation-imparting meansengageable and disengageable with the yarn guide adapted when so engagedto over-ride the normal traverse reciprocation and to impart a bunchbuilding reciprocation for the commencement of winding of a pirn.

2. Yarn guide mechanism for an automatic pirn Winder having operationsequence control mechanism and comprising in combination a yarn guidecarriage having means for advancing the same progressively, areciprocable yarn guide mounted on the carriage, reciprocation impartingmechanism on the carriage engageable and disengageable with the yarnguide for imparting reciprocation thereto when so engaged to provide anormal traverse for the wind and means for imparting a bunch buildingtraverse to the yarn guide over-riding the normal traverse aforesaidcomprising further reciprocationimparting mechanism engageable anddisengageable with the yarn guide and means engageable and disengageableWith the said operation sequence control mechanism of the pirn Winderfor engaging and disengaging said further reciprocation-impartingmechanism for bunch building at the commencement of winding of eachpirn.

3. Yarn guide mechanism according to claim 2 wherein the means forimparting bunch building reciprocation to the yarn guide comprises ahook engageable with the yarn guide, mechanism for moving the hook inone dimension to bring the same into or out of engagement with the yarnguide, further mechanism for reciprocating the hook to impart a bunchbuilding traverse to the yarn guide and means engageable anddisengageable with the operation sequence control mechanism for movingthe hook to engage with and disengage from the yarn guide.

4. Yarn guide mechanism according to claim 2 wherein the means forimparting bunch building reciprocation to the yarn guide comprises ahook-ended lever, the hook of which is adapted to be engaged with theyarn guide, a pivot rod mounted in a guide in the machine and xed to thelever, cam means for reciprocating the said pivot rod in such manner asto impart bunch building reciprocation to the yarn guide and means,engageable and disengageable with the sequence control mechanism andconnected to the other end of the lever for tilting the lever to bringthe hook into or out of engagement with the yarn guide.

5. Yarn guide traverse mechanism for a winding machine comprising apivotally mounted yarn guide, a cam follower connected to and actuatingsaid yarn guide, a face cam mounted for rotation about an axissubstantially at right angles to the yarn guide pivot, a plurality ofconcentric wavy paths of varying amplitudes on said face cam andadjustable cam follower means to contact a selected wavy path, incombination with a bunch builder, means for engaging said bunch builderwith the yarn guide so as to override the action of the cam, means forreciprocating the bunch builderso as to reciprocate said yarn guide forbuilding an initial bunch of turns and means for disengaging the bunchbuilder from the yarn guide after building the said bunch for furtherreciprocation of said guide by the said cam.

6. In a winding machine in combination a carriage longitudinally movableparallel to the winding axis, a yarn guide pivotally mounted on saidcarriage, a cam shaft parallel to said winding axis, a face cam mountedto rotation on said cam shaft and longitudinally slidable thereon, thethrow of said face cam varying at different radial distances from itscentre, means associated with the carriage for moving said face camlongitudinally on its shaft in unison with the carriage movement on acam follower associated with said yarn guide adjustable to contact theface cam at different radial distances, in cornbination with a bunchbuilder means for engaging said bunch builder with the yarn guide so asto override the action of the cam, means for reciprocating the bunchbuilder so as to reciprocate said yarn guide for building an initialbunch of turns and means for disengaging the bunch builder from the yarnguide after building the said bunch for further reciprocation of saidguide by the said cam.

References Cited in the iile of this patent UNITED STATES PATENTS1,935,524 Schweiter Nov. 14, 1933 1,969,593 Davidson Aug. 7, 19342,688,451 Wright Sept. 7, 1954 2,701,108 Muschamp et al. Feb. 1, 1955

